MnZn单晶的X射线定向切割

本文详细叙述了MnZn铁氧体单晶材料的X射线定向切割原理及其实验方法。重点描述不需作极射赤面投影对劳厄斑点的指数化和视频磁头用的(110)(111)(211)三个互成90°方向的标定。     

铝-锶合金长效变质剂的生产

涿州市轻金属加工厂及涿州市轻金属加工技术研究所同第一汽车制造厂工艺研究所及中国科学院长春应用化学研究所合作,开发研制了Al-Sr合金长效变质剂,两年来在一汽及一汽长春轻型发动机厂经过实验室和工业试用,证明效果全面良好.该厂于1991年4季度开始用Al-Sr合金变质剂取代三元盐变质剂,为在我国推广Sr变质开辟了新路.本产品已通过河北省省级产品与成果鉴定.现已投入批量生产.     

Metallographic Characterization of the Microstructure of Tool Steels

Examination of selectively etched tool steel microstructures by light microscopy provides more information than standard etchants, such as nital, picral or Vilella‘s reagent. Further, the images are more suitable for quantitative measurements, especially by image analysis. Specimens must be properly prepared, damage free, if selective etchants are to be applied successfully. A number of etchants have been claimed to selectively etch certain carbides in tool steels. The response of these etchants has been evaluated using a variety of well-characterized tool steel compositions. While many are selective, they are often selective to more than one type of carbide. Furthermore, their use in image analysis must be evaluated carefully as measurements showed that the amount and size of the carbides are often greater after selective etching as many of these reagents outline and color or attack the carbides. Selective etching of the matrix, leaving the carbides unaffected works well, but no one etchant will cover the broad spectrum of tool steel compositions. No etchant has been found that will color retained austenite in tool steels and image analysis of retained austenite in tool steels are always much lower than by x-ray diffraction unless retained austenite is the dominant phase present in grossly over-austenitized steels.     

挤出成型粘结铁氧体永磁的研究

介绍了粘结永磁铁氧体的挤出成型技术，得到了较好的性能，给出了实验结果。     

多孔磁芯磁参数及测试方法研究

确定了多孔磁芯磁参数及方法，推荐了测试仪器，建立了测试系统，给出了基本测试误差。     

强功率铁氧体线短脉冲的产生

本文叙述了用铁氧体线形成强功率窄脉冲的几种方法及其实验结果。脉冲宽度从几到几十毫微秒,峰值功率大于十万瓦。     

当前我国铁氧体磁性材料的技术状况浅析

本文对当前我国铁氧体磁性材料的生产工艺、设备、技术开发研究情况作了全面分析,并对铁氧体及磁芯生产状况作了国内外分析比较.     

铁电/铁磁复合材料的磁性能和介电性能研究

铁电/铁磁复合材料是一类在材料内部同时共存铁电相和铁磁相的重要功能材料。在外加磁场和电场的作用下,其磁化和极化状态易于调控。笔者以铁电性的钛酸钡和铁磁性镍铜锌铁氧体纳米粉为原料,采用固相反应法,合成了一系列铁电/铁磁复合材料。研究表明:在一定温度下烧结所得的铁电/铁磁复合材料,由铁电相和铁磁相两相所组成,对外表现出铁电性和铁磁性。该复合材料同时具有电感和电容两种特性,而且频率稳定性好,有望替代现有的分立式无源滤波器,做到真正的集成而广泛应用在集成电路中。